Glove-sewing machine



A. Ganas.` GLOVE SEWING MACHINE.

APPLICATION FILED JUNE 23, I920.

mv A

Patented Aug. 16, 1921.

lNvENToR @u A? WITNESSES:

WLM ATTQRNEY WITNESSES:

A. GRIEB.

GLOVE SEWING MACHINE.

APPLICATION FILED JUNE 23| 1920.

3 SHEETS-SHEET 2.

INVENTOR ATTORNEY Patented Aug. 16, 1921.

A. GmEB.

GLOVE SEWING MACHINE.

APPLICATION FILED JUNE-23| I920.

PatentedAug. 16, 1921.

' 3 SHEETS-SHEET 3.l

lNvENToR @u/ al yW ATTORNEY WITNESSES:

UNITED STA'ES PATENT 4OFFICE.

ALFRED GRIEB, OF ELIZABETH,' NEW JERSEY, ASSIGNOR TO "IIEEEv SINGER MAl\TU` FACTURIN'G COMPANY, OFl ELIZABETH, NEW JERSEY, A CORPORATION' OF NEW JERSEY.

GLOVE-SEWING MACHINE.

T o allwhom t may concern `Be it known that LFREDGRIEB, a citicompanying drawings.

vThis invention relates to glove sewing machines andmore.particularly to the looperoperating mechanism therefor.

Among the objects of the invention is to provide a simple and reliable operating mechanism for this type of looper which will cause a decided dwell in the looper movements at the time of presenting the loop for entrance of the needle, so that the point of the needlewill enter well into the loop before the looper commences itsloopshedding movement and which will then give a rapid loop-shedding movement so that preferably the loop will be shed substantially at the time the eye of the needle enters the work or very quickly thereafter. This is to prevent any great strain being put on the thread by the eye of the needle drawing it through the work, `as is the case when the thread is still on the looper at this time, with a resultant liability ofbreakaqe.V

In the preferred embodiment a mainshaft extends transversely of the frame of the machine from which the various move- Y ments are imparted to the needle, looper and feed mechanism. y

The looper-is lmounted on a bar which is in turn mounted to oscillate in a support, the

oscillating. movements being imparted by means of a ball-studoperating in a camgroove provided in a disk on theshaft. The support has pivotal connection adjacent one end with the free end of a crank fulcrumed in the frame, and between this point and the looper hasa link connection with one end of a lever fulcrumed intermediate its ends in the frame. VOn the shaft is a four-motion cam and movements are imparted from this cam to the looper-support by means or' a floating member provided with a fork embracing the cam and having pivotal connections withAthe-crank and the other end of the lever.`

Referring to the accompanying drawings which illustrate the preferred form of my v Specification of Letters Patent. Patented Aug, 1631921,

Application filed June 23, 1920. Serial No. 391,083.

invention Figure 1 is a side elevation lookingfrom the right of the machine with a portion of the frame broken away so .as to clearly showthe mechanism. i Fig. 2 is ay plan view with the cover removed. ,Fig. 3 is a partial front elevationwiththe feed-wheels removed. and with portions of the frame broken away to more clearly show the construction and Fig. 4 is a detail of they pivotal connection between the looper-support, the crank and the floating driving member.v

In the form of the device shown numeral l represents the frame of the machine which comprises the base ,portion 2 andthe body portion 3 pivoted atone side to the base portion at 4 and secured thereto at the other side by means `of screws 5. During normal operation the open top of the body portion is closed by meansof a coverl 6 hinged to the body portion at 7, said cover carrying the spool-supports 8, constant tension devices 9, the thread-guide 10 and slack thread takeup 10. v

Mounted at the front of the frame are the two horizontal feed-wheels 11 and 12, the inner wheel 11 being secured on a post 13 mounted inthe frame while the outer wheel 12 is mounted on the upper portion of a bracket 14 pivoted in the'frame at 15 and which has an arm 1 6 carrying a roller-stud 17. Bearing u on this stud is the spring 18 which tends to old the wheel 12 against the periphery of the wheel 11. Pivoted in the frame at19 is a bell crank-lever 20, one arm of which bears against the under side of the roller-stud 17 and the other arm'.having a connection 21 with vany suitable treadle-opL erating mechanism, not shown, whereby the wheel 12 may be moved away from wheel 1l to facilitate the insertion of the work therebetween. The tension of the spring 18 may be adjusted by means of the adjusting screw 22.V

kExtending transversely ofthe frame is the driving 'shaft 23 provided onopposite ends thereof with the hand-wheels 24 and 25, one of which isformed with a beltgroove 26 for a beltA leading to suitableare also suitable eccentrics and cams for llo in bearings 29 and 30 secured in the frame. A collar 31 is clamped to the bar and has connection by meansof a link 32 to the arm 33 of a bellcrank-lever fulcrumed at 34 in the frame, the otherarm having pivotal connection at 38 with the pitman 39 which em` braces a suitable eccentric 40 on the shaft 23. The connection at 38 comprises a pin eccentrically mounted in they arm of the bellcrank-lever and by turningthis pin on' its pivot the length of the arm may be varied to adjust the length lof the needlestroke. The eccentric pin 38 is secured in adjusted position by means of a screw 41.

The looper 42 is of the thread-carrying typeand is given rocking movements transverse of the needle-path and is given up and down movements vand movements across over the free edge ofthe work. Thislooper is adjustablyy secured at 43 to the endof the looper-bar 44 whichbar is mountedin a support 45 in the form of a sleeve. To the rear end of the looper-bar 44 is clamped a collar 46 provided' with a ball-stud 47 adapted to run in a cam-groove 48 in the face of the cam-disk 49 mounted on the shaft 23. By means of this 'ball-stud and cam-groove rocking or oscillating movements are imparted to the looper.

The 'support 45 for the looper is pro-vided with acollar 50 clamped thereeon by means of a screw 51 which is provided with apivot-r rvthe other end of this link being pivoted at 60 to the upper end of a lever 61 fulcrumed intermediate its ends 62 in the frame of the machine. Up and down movements and movements across the edge of the work are imparted to the looper by means of a floating member 63 which is pivoted onthe Y pin 52 as shown in Fig. 4, the extension 63 Asthe shaft rotates the cam 66, the fioatingv member is movedv back and forth, the pivot pin 52 oscillating about the fulcrum 53, thus moving the looper-support and the looper back and forth in a direction across the edge v of the work. As the pivot pin 52 is moved to the left yas viewed in Fig. 1, the pivotal connection at 60 is moved to the right about the fulcrum 62 and the combined rising and` falling movements of the pin 52 and the pivot 60 give very rapid rising and falling movements to the looper. The fourmotion cam 66 is provided with a counterweight portion 67.

It will be noted that as the portion of the four-motion cam 66, which is shown in contact with the right-hand member of the fork in F ig. l, is the arc of a circle whose center is the center of the shaft 23, at this time the looper is at its eXtreme right-hand position with a loop presented for the entrance of the needle and that it will be held stationary until the upper sharply curved portion 68 starts to move away from the surface of the fork. When this takes place the point of the needle has entered well into the loop and the floating member 63 will be given a rapid movement to' the left, as viewed in Fig. l.V As-the pin 52 moves to the leftthe pivotal connection at 60 move-s in the opposite direction or to the right and the combined movements of the pivot pins 52 and the pivotal connection at 60 give a very rapid rising movement to the looper and by the time the eye 27 of the needle has moved through the work the loo-per has moved to shed the loop. As the eye of the needle after it passes through; the work Adraws considerable thread with it, it will be cl-ear that it is very desirable that the loop should be shed fro-m the looper at this time to give up this required amount of thread and prevent undue strain thereon with its resultant liability of breakage.

Mounted upon the forward end of the needlebar is the nipper 69 which is operated as the needle reciprocates by the cam-plate 70 mounted upon the frame of the machine. Also secured uponthe frame of the machine is a stripper-linger and guide 71 and secured to the upper end of the bracket-arm 14 for the outer feed-wheel 12 is the needleguide 72. i

The inner feed-wheel 11 is intermittently rotated a stitch length at a timel by means of suit-able feed mechanism (not shown) within the frame, which mechanism is driven from the Ymain-shaft 23 by means of a pitman 73 having a strap embracing an eccentric 74 on the shaft.

Having thus `set forth the nature of the invention, what I claim herein is 1.1n a sewing machine, a frame, stitchforming mechanism comprising a needle and looper, a looper-support, a shaft having driving means thereon, a lever fulcrumed in the frame and having` operative' connection with the looper-support, a crank fulcrumed in the frame and having operative connection with said support, and a floating member having operative connection with said lever, crank and driving means.

2. In a sewing machine, a frame, a shaft having driving means thereon, stitch-forming mechanism including a looper and looper-support, means for operating the looper comprising a crank-arm fulcrumed in the frame and connected to the looper-support, a lever fulcrumed in the frame and having link connection with the looper-support, and a floating member operatively connected with the driving means, crank and lever.

3. In a sewing machine, a frame, stitchforming mechanism including a1 looper, a support therefor, means for imparting to the looper rising and falling movements and movements transverse the line of seam comprising a crank fulcrumed in the frame and pivotally connected with said support, a lever fulcrumed in the frame and having link connection with said support, a driving shaft, a cam thereon, and a floating member coperating with the cam and having pivotal connection with said crank and said lever.

4. In a sewing machine, a frame, a shaft, a cam on said shaft, stitch-forming mechanism including a needle and looper, a support for said looper, means for oscillating the. looper, means for driving the looper comprising a lever fulcrumed in the frame and having a link connection with said support, a crank fulcrumed in the frame and having a pivotal connection with said support, a floating member coperating with the cam and having pivotal connection with the crank and with said lever.

5. In a sewing machine, in combination, a frame, stitch-forming mechanism including a needle and looper, a looper-supporting means, means for oscillating the looper, a main-shaft, means for imparting to the looper up and down movements and movements transverse the line of seam comprising a crank fulcrumed on the frame and having pivotal connection with Vthe loopersupport, a lever fulcrumed intermediate its ends in the frame, a link connection from one end of the lever to the looper-support, a floating member connected to the other end of said lever and to the free end of said crank, and driving means on the shaft cooperating with said floating member.

6. In a sewing machine having a frame, a driving shaft, a four-motion cam thereon, stitchformingA mechanism comprising a needle and looper, a support for the looper, means for oscillating the looper in the support, means for driving the looper comprising a crank-arm fulcrumed in the frame and pivotally connected with said support, a lever fulcrumed intermediate its ends in the frame, a link connecting one end thereof with said support, and a floating member having a Vfork embracing said cam and having pivotal connections with said crank and the other end ofthe lever.

7. In a sewing machine, stitch-forming mechanism includinga looper and a support therefor, means for imparting movements to the looper comprising a pivotally mounted armhaving pivotal.v connection with the support, a pivotally mounted lever having link connection with said support, and means for simultaneously imparting to the pivot between the arm and the support and the pivot between the Vlink and the lever movements in opposite directions.

8. In a sewing machine, stitch-forming` mechanism including a looper and a support therefor, means for imparting movements to the looper comprising a pivotall-y mounted arm having` pivotal connection with said support, a pivotally mounted lever, a sustaining member for the support having pivotal connection with said lever, and means for simultaneously imparting to said pivotal connections movements in opposite directions.

9.' In a sewing machine, stitch-forming mechanism including a looper, a frame, a

looper-support, a shaft, means for impart-V ing movements to the looper including an arm fulcrumed in the frame and having pivoral connections with the looper-support. a

lever fulcrumed in the frame, a link piv-V otally connected to the lever and to the looper-support, and means for imparting from the shaft to the pivotal connection between the arm and looper-support and the pivotal connection between the link and the lever simultaneous movements in opposite directions. Y

In testimony whereof I have signed my name to this specification.

ALFRED GRIEB. 

